Are there external factors that make them bad investments?

I am also an investment real estate agent with Buckingham Investments and recently transitioned from being an external auditor with several CPA firms including Grant Thornton.

If the existing heaters are inside, but in a location that could trash/flood the rest of a rental or risk rentals downstream, and he has to replace them anyway, maybe considering an external tankless should be on their radar?

Not all of that will be available in a serious downturn, but it's a good indication of money out there waiting for higher returns.That doesn't mean there won't be a cyclical slowdown or some external shock to the economy.

Not sure if I can post links to external sites, but here's Rod's article on this that I was talking about:https://rodkhleif.com/the-4-markets-to-invest-in-first-5-five-critical-things-to-evaluate-in-real-estate-investing/

Once my corporation starts to make enough money on its own then it can be the guarantor without me.And if you buy a bigger complex such that it is deemed a commercial sale rather than residential - then they just look at the deal instead of you.interesting info, thanks. what is your experience (if any) with bringing in external investors through your corporation vs personal? 

The property is currently rented through April and we use an external company for managing the rental.

The external paint color right now is purple and badly needs a new paint job.

If the RE Agent will not allow the free home estimator into the property (I don't know why they would not) then have them do an external evaluation during the day so they can look through the windows.

But it's an example of how external forces COULD cause a housing market collapse.